Terminal on Old Thermostat
, 4, V
If both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc.
Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B.
Tape off end of the wire with electrical tape and push the taped wire back into the wiring hole in the wall.
STEP 5. INSTALL THE BATTERIES
Three fresh AA alkaline batteries must be installed for pro-
gramming and operation of the thermostat and the heat-
Install the batteries in the wallplate so the positive terminals all
point up (see illustration).
Table 2. Terminal Designations on Old and New Thermostats.
Do not connect.
Do not continue installation.
Power for cooling
Changeover in cool. (Single stage heat pump only).
Changeover in heat. (Single stage heat pump only).
Second stage heat.
Second stage cool.
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS